MESON Chess Problem Database
Problem Display
PID: 204313 (3r3b/4R1PK/Qp3k2/2B2n2/3n3P/4NbN1/2pp4/3qrR2 w - - 0 1)
Dohrn-Luttgens, Julius
Comm., Centurini/Guidelli MT, 1925
#2
9 + 11
| 6490 | yacpdb | 2020 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rd5
- 2.g8S#
- 1...Rd6
- 2.g8S#
- 1...Rd7
- 2.g8S#
- 1...Rf8
- 2.gxf8Q#
- 2.gxf8R#
- 1...Be2
- 2.Se4#
- 1...Be4
- 2.Sxe4#
- 1...Bg4
- 2.Se4#
- 1...Bh5
- 2.Se4#
- 1...Sxh4
- 2.Se4#
- 1...Sd6
- 2.Sd5#
- 1...Sh6
- 2.Se4#
- 2.Sh5#
- 1...Sxg7
- 2.Sg4#
- 2.Se4#
- 1...Rd5
- Tries
- 1.Sd5+?
- 1...Rxd5
- 2.g8S#
- 1...Bxd5!
- 1...Rxd5
- 1.Rxf3?
- threat
- 2.Sg4#
- 2.Se4#
- 2.Sh5#
- 1...Rxe3
- 2.Sh5#
- 1...Rd6
- 2.g8S#
- 1...Se6
- 2.Sg4#
- 2.Rxf5#
- 1...Qxf3!
- threat
- 1.Qxb6+?
- 1...Rd6
- 2.g8S#
- 1...Bc6
- 2.Se4#
- 1...Se6
- 2.Qxe6#
- 1...Sd6
- 2.Sd5#
- 1...Sc6!
- 1...Rd6
- 1.gxh8Q+?
- 1...Sg7
- 2.Sg4#
- 2.Se4#
- 2.Sh5#
- 2.Qxg7#
- 1...Rxh8+!
- 1...Sg7
- 1.gxh8B+?
- 1...Sg7
- 2.Sg4#
- 2.Se4#
- 2.Sh5#
- 2.Bxg7#
- 1...Rxh8+!
- 1...Sg7
- 1.g8Q?
- threat
- 2.Qf7#
- 2.Qg5#
- 2.Qg6#
- 1...Sxh4
- 2.Sg4#
- 2.Se4#
- 2.Sh5#
- 1...Sxe7
- 2.Sg4#
- 1...Rd6
- 2.Qf7#
- 2.Qg5#
- 2.Qf8#
- 1...Se6
- 2.Rxe6#
- 2.Qxe6#
- 1...Sd6
- 2.Sd5#
- 2.Qg5#
- 1...Rf8
- 2.Qg5#
- 2.Qg6#
- 2.Qxf8#
- 1...Bd5
- 2.Qg5#
- 2.Qg6#
- 1...Bh5
- 2.Se4#
- 2.Qg5#
- 1...Bg7
- 2.Qf7#
- 1...Sh6
- 2.Se4#
- 2.Sh5#
- 2.Qg5#
- 2.Qg6#
- 1...Sg7
- 2.Sg4#
- 2.Se4#
- 2.Qf7#
- 1...Rxg8!
- threat
- 1.Sd5+?
- Keys
- 1.Qc4!
- threat
- 2.Qf7#
- 1...Sxh4
- 2.Se4#
- 1...Sxe7
- 2.Sg4#
- 1...Se6
- 2.Qxe6#
- 1...Sd6
- 2.Sd5#
- 1...Rd5
- 2.g8S#
- 1...Rf8
- 2.gxf8Q#
- 2.gxf8R#
- 1...Bd5
- 2.Qxd4#
- 1...Bh5
- 2.Se4#
- 1...Sh6
- 2.Se4#
- 2.Sh5#
- threat
- 1.Qc4!
This anticipates 229045(1926)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- R(j);N_GUARD::P=S
- R(j);N_GUARD,N_SPINP(h)::P=S
- R(j);OGATE::PXR(j)=Q
- B(e);N_GUARD,P_SPINS(g)::S(C)
- B(e);N_GUARD,P_SPINS(g)::S(C),XB(e)
- S(g);P_SPINB(e),XP(D)::S(C)
- S(g);N_SPINP(h),P_SPINB(e),S_CUTR(j)::S(B)
- Tries
- Try
- S(B);CHECK
- Vars
- R(j);N_GUARD,S_CUTB(e),XS(B)::P=S
- Refutation
- B(e);P_SPINS(g),XS(B)
- Try
- R(A);P_PINS(g),XB(e)
- Threat
- DUALS(3)
- Vars
- R(b);XS(B)::S(C)
- R(j);N_GUARD,N_SPINP(h)::P=S
- Refutation
- Q(a);N_SPINS(g),XR(A)
- Try
- Q(F);CHECK,XP(h)
- Vars
- R(j);N_GUARD,P_SPINR(j),S_CUTB(e),S_CUTS(f),S_CUTS(f),S_CUTS(g)::P=S
- B(e);P_SPINB(e),P_SPINS(g)::S(C)
- S(f);N_GUARD,P_SPINS(f)::QAR1(F),XS(f)
- S(g);P_SPINB(e),P_SPINS(g)::S(B)
- Refutation
- S(f);P_SPINS(f)
- Try
- P(H);CHECK,XB(k)
- Refutation
- R(j);CHECK,XQ(H)
- Try
- P(H);CHECK,XB(k)
- Refutation
- R(j);CHECK,XB(H)
- Try
- P(H);
- Threat
- DUALS(3)
- Vars
- S(g);P_SPINB(e),XR(G)::S(B)
- B(k);::QAR1(H)
- Refutation
- R(j);XQ(H)
- Try
- Actual
- Q(F);N_PINP(h)
- Threat
- QAR1(F)
- Vars
- S(g);P_SPINB(e),XP(D)::S(C)
- S(g);P_SPINB(e),XR(G)::S(B)
- S(f);N_GUARD::QAR1(F),XS(f)
- S(g);P_SPINB(e),S_CUTR(j)::S(B)
- R(j);N_GUARD::P=S
- R(j);OGATE::PXR(j)=Q
- B(e);P_SPINS(g),S_CUTR(j)::QAB(F),XS(f)
- B(e);N_GUARD,P_SPINS(g)::S(C)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).